Has anyone done this? Where you really like the person and then suddenly you are scared to even try to get closer to them?

Basically yesterday I bought flowers and had them deliver yesterday. I really really like this girl I’m talking to like a lot but out of nowhere yesterday night I decided that I just don’t want to get close since I’m scared of getting hurt. She knows I’m dealing with depression and I’ve been getting better but since we are 4-5 hours apart from each other I have anxieties thinking of her. I know her well that I believe she would never do anything to hurt me. My anxiety just is getting the best of me. Next week we are gonna see each other and I’m excited but if I’m feeling like this idk what to do I feel like I’m fighting myself a lot. I am taking medications but it’s just me and I hope she doesn’t get hurt that I just need a few days for myself. I don’t want to lose her but I also don’t want these anxieties eating me alive.